3
I don't know if I understand your question?
But for example if I wanted to add this banner to a block
![Resized Image](http://www.axandra.com/affiliates/ibp/english/468x60-full-banner.gif)
It shows up like this
[img width=468]http://www.axandra.com/affiliates/ibp/english/468x60-full-banner.gif[/img]
I don't know were to check/change which editor I'm using.